feat: 2025-10-23打卡

2025-10-23 16:32:13 +08:00
parent 59f245dda7
commit f06095ad7e
9 changed files with 378 additions and 0 deletions
--- a/3.longest-substring-without-repeating-characters.java
+++ b/3.longest-substring-without-repeating-characters.java
@@ -0,0 +1,39 @@
+/*
+ * @lc app=leetcode id=3 lang=java
+ *
+ * [3] Longest Substring Without Repeating Characters
+ */
+
+// @lc code=start
+class Solution {
+    public int lengthOfLongestSubstring(String s) {
+        if(s.length() == 0) {
+            return 0;
+        }
+        Set<Character> chs = new HashSet<>();
+        int i = 0, j = 0, r = 0, cur = 0;
+        while(j < s.length()) {
+            if(!chs.contains(s.charAt(j))) {
+                chs.add(s.charAt(j));
+                cur++;
+                if(cur > r) {
+                    r = cur;
+                }
+            } else {
+                while(s.charAt(i) != s.charAt(j)) {
+                    chs.remove(s.charAt(i));
+                    i++;
+                }
+                i++;
+                cur = j - i + 1;
+                if(cur > r) {
+                    r = cur;
+                }
+            }
+            j++;
+        }
+        return r;
+    }
+}
+// @lc code=end
+